The idea is to read books by European authors or books set in European countries (no matter where the author comes from). The books can be anything – novels, short stories, memoirs, travel guides, cookbooks, biography, poetry, or any other genre. You can participate at different levels, but each book must be by a different author and set in a different country.

LEVELS OF PARTICIPATION:
Five Star (Deluxe Entourage): Read at least five books by different European authors or books set in different European countries.
Four Star (Honeymooner): Read four qualifying books.
Three Star (Business Traveler): Read three qualifying books.
Two Star (Adventurer): Read two qualifying books.
One Star (Pensione Weekender): Read just one qualifying book.

I'm doing this challenge at level Five Star.
There are a lot of other rules (and you can also win a prize!) you can find them here!